DNS Lookup — Server Diagnostic Tool

Network

DNS Lookup is a server-based utility that checks a, aaaa, cname, mx, ns, and txt records for a domain from an entered domain.

DNS Lookup

Server lookupSSRF protected

Utillica checks only public URLs or domains from the server. Localhost, private IPs, internal networks, and metadata hosts are blocked, and raw API errors are hidden.

Domain

What is it

DNS Lookup fetches HTTP, DNS, robots.txt, sitemap, and Open Graph signals that are hard to inspect directly from a browser and summarizes them in a table. Localhost, private IPs, and internal networks are blocked for security, and results are a point-in-time reference.

Input URL or domain → server lookup → response status, headers, and metadata summary

How to use

1Enter the domain.
2Press lookup.
3Review status codes, records, headers, or metadata.

Reference

DNS Lookup — Server Diagnostic Tool Reference
Input	Result
domain	checks A, AAAA, CNAME, MX, NS, and TXT records for a domain

Sources & standards

HTTP Semantics - IETF
The robots.txt file format - IETF
Sitemaps XML protocol - Sitemaps.org
The Open Graph protocol - Open Graph protocol
WHOIS Protocol Specification - IETF
The Transport Layer Security (TLS) Protocol Version 1.3 - IETF

FAQ

Can DNS Lookup check localhost?

No. Localhost, private IPs, and internal network addresses are blocked to prevent server-side request forgery.

Are DNS Lookup results live?

They are fetched by the server at request time. DNS, caches, redirects, and target server policies can change the result.